lemmy/crates/apub/src/http/post.rs

use crate::{
  http::{
    check_community_public,
    create_apub_response,
    create_apub_tombstone_response,
    redirect_remote_object,
  },
  objects::post::ApubPost,
};
use activitypub_federation::{config::Data, traits::Object};
use actix_web::{web, HttpResponse};
use lemmy_api_common::context::LemmyContext;
use lemmy_db_schema::{
  newtypes::PostId,
  source::{community::Community, post::Post},
  traits::Crud,
};
use lemmy_utils::error::LemmyError;
use serde::Deserialize;

#[derive(Deserialize)]
pub(crate) struct PostQuery {
  post_id: String,
}

/// Return the ActivityPub json representation of a local post over HTTP.
#[tracing::instrument(skip_all)]
pub(crate) async fn get_apub_post(
  info: web::Path<PostQuery>,
  context: Data<LemmyContext>,
) -> Result<HttpResponse, LemmyError> {
  let id = PostId(info.post_id.parse::<i32>()?);
  // Can't use PostView here because it excludes deleted/removed/local-only items
  let post: ApubPost = Post::read(&mut context.pool(), id).await?.into();
  let community = Community::read(&mut context.pool(), post.community_id).await?;
  check_community_public(&community)?;

  if !post.local {
    Ok(redirect_remote_object(&post.ap_id))
  } else if !post.deleted && !post.removed {
    create_apub_response(&post.into_json(&context).await?)
  } else {
    create_apub_tombstone_response(post.ap_id.clone())
  }
}